Preheat your oven to 175°C (350°F).
Melt the butter and use about 5g to generously grease your muffin pan.
In a large bowl, combine the white spelt flour, wholemeal spelt flour, baking powder, baking soda, paprika, chives, and crumbled feta. Mix well.
In a separate bowl, whisk together the egg, milk, and the remaining melted butter.
Pour the wet ingredients into the dry ingredients and gently combine until just mixed. The batter will be thick and sticky—do not overmix.
Divide the batter evenly between six muffin pan holes. It’s fine for the batter to come right up to the top.
Bake for 20–22 minutes, or until the muffins are golden and a skewer inserted in the centre comes out clean.
Allow to cool slightly before serving.